#define _CRT_SECURE_NO_WARNINGS 1

#include <stdio.h>

int main()
{
	int arr[20] = { 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20 };
	int sz = sizeof(arr) / sizeof(arr[0]);
	int max = arr[0];

	for (int i = 0; i < sz; i++)
	{
		if (arr[i] > max)
		{
			max = arr[i];
		}
	}

	printf("%d", max);

	return 0;
}